Insert for concrete constructions.



W. H. HONISS. INSERT FOR CONCRETE .CONSTBUOTIONS.

APPLIGATION IILED 11111.3. 1910.

1,1 10,440. Patented Sept. 15, 1914.

WWW

UNITED STATES PATENT OFFICE.

WILLIAM H. HONISS, 0F HARTFORD, CONNECTICUT, ASSIGNOR T0 WILLIAM T.

ENGLISH, OF HYDE PARK, MASSACHUSETTS.

INSERT FOR CONCRETE CONSTRUCTIONS.

To all whom it may concern:

Be it known that I, WILLIAM H. HONISS, a citizen of the United States, and resident of Hartford, in the county of Hartford and State of Connecticut, have invented certain to receive a nut or the head of a bolt or other equivalent clamping members, for use in bolting or clamping brackets, hangers, stringers, or other members which require to be removably and yet firmly attached to the surface of the concrete.

The structure of concrete is usually too brittle or friable to hold a nut or the head of a bolt under circumstances like those for which this invention is intended. It is moreover difficult to predetermine the exact desired position of any bolt, or a series of bolts for attaching hangers or similar members to the concrete structure. Hence the desirability and importance of providing inserts constituting receiving seats or sockets of firm and strong material, preferably of metal, which may be firmly embedded in'the concrete when the latter is cast, and which will permit bolts, nuts, and similar members to be subsequently introduced and allow them a reasonable latitude of lateral adjustment while holding them and'their appurtenant objects securely in position when fastened to place.

Figure 1 of the drawings is an end view of one of these inserts in the form preferred when made of iron or similar metal, this figure illustrating also the manner of attaching the insert in position while casting the concrete. Fig.2 1s a side view of the insert projected from Fig. 1. Fi 3 is a cross-sectional end view showing t e insert embedded in the concrete, and showing also the head of a bolt in its entering position in the insert. Fig. g is a side View projected from Fig. 3, in section taken substantially through the longitudinal center of the insert. Fig. 5 is a face "iew of the insert showing a bolt located at one end of the slot, and showing in dotted lines the outline of the head of a bolt in its entering position. Fig. 6 is a face view of the in- Specification of Letters Patent. Patented Sept, 15 1 914, Application filed January 3, 1910. Serial No. 5 535,972.

The preferred embodiment of this invention, illustrated in the accompanying drawlngs, is of the form and approximate proportions preferred when the insert is made of cast or malleable iron, the body portion having an inner cavity 9 for receiving a nut or bolt head, the upper portion of the cavity being wider than the diagonal dimen sions of the nut or bolt head, as shown in Fig. 3, so as to enable the nut or bolt to be turned from its entering to its resting position, and vice versa. The lower portion of the cavity 9 is narrower, its side walls serving-to(prevent the nut or bolt from turning aroun when in its resting position, as in Figs. 1 and. 7. The length of the insert, shown in Fig. 2, is made sufiicient to allow of the desired lateral adjustment of the bolt. In this view the ends 10 of the insert are shown to be parallel. Obviously, however, these may also be inclined or keystone shaped, as well as the sides 11. For the sake of additional firmness, the insert may be provided with a base 13 connected bolt to be employed, this slot extending through to the inner cavity or aperture 9.

At the sides of this slot are the shoulders 20, upon which the underneath shoulders of the nut or bolt head are supported in their resting position shown in Figs. 1 and 7, the,

adjacent side walls 19 above those shoulders serving to prevent the nut or bolt head from turning around while being screwed to place.

To enable the nut or bolt head to be admitted and removed through the" face of the insert oppositely disposed recesses 21 are provided, extending from the face of the insert up through and past the supporting shoulders 20 and through the side walls 'of the inner cavity 9. These recesses are of a form and proportions suitable for admitting the diagonally opposite corners of the nut or bolt head when the latter is turned diagonally as shown by the dot-and-dash square in Fig. 5. The bolt head when in this position is pushed through the recess to the top of the cavity 9, as shown in Fig. 3, at which position its corners clear the side walls of that cavity, enabling it to be turned so as to bring its side faces in parallel relation to and between the guiding side walls 19, and it is then lowered to its resting position upon the shoulders 20, as shown in F'gs. 1, 6 and 7, in which position the guiding surfaces, being closer together than the diagonal distance across the corners, prevent the nut or bolt from turning. In order to remove the bolt from the slot, it is only necessary to reverse the entering operation, lifting it to the top of the cavity 9, and turning it diagonally to the position shown in Fig. 3, and then dropping its corners out through the recesses 21. These recesses are herein shown to be of V form, conforming to the diagonally opposite corners of the bolt head or nut.

In the modification of the invention shown in Fig. 7 the inclined interior walls of the cavity for the bolt head are stepped instead of being plane inclines as in the other fig ures. The guiding surfaces 28 for keeping the head from turning are parallel instead of diverging, while the space 29 above those surfaces opens more abruptly, forming in effect a double stepped T slot.

In Fig. 1 is illustrated a convenient method of holding the insert in its desired position relative to the form or mold, while casting the concrete around it. When the face of the insert is to be flush with the face of the concrete, a hole may be bored in the form 24 at approximately the position to be subsequently occupied by the bolt employed in the insert, and the insert is bolted in position on the form by means of a temporary bolt 25. When the insert is to project beyond the face of the concrete, the form board 24 may be suitably recessed or an additional board be fastened on below the form tosupport the insert in the desired relation to the concrete. Instead of, or in addition to the bolt 25, the insert may be held in place by suitable ears, lugs, or flanges 26, notched or apertured to receive the nails 27, by means of which the insert may be fastened to the inner face of the form or mold, or to any other. convenient part. After the insert is secured approximately in its desired position, the concrete is cast in the form, flowing and packing closely around the insert as shown in Figs. 3 and 4. After the concrete is set, and the form is removed, bolts and nuts of the intended di ensions .nay be put in place in the insert as illustrated in Figs. 3, 4 and 5, for attaching the desired brackets, hangers,

stringers, or whatever is to be supported. The bolts or nuts may be removed at any time and be replaced by other bolts or nuts, for example, if they become worn or rusted, or if bolts of a different length are required. The length of the slot enables the bolt to be adjusted laterally from the approximate position first determined, this being frequently desirable, as for example in putting up hangers for shafting, to enable the hangers to be adjusted into alinement.

The dimensions of the insert may be modified to suit the materials of which it is made, and according to the service required of it. The face 15 of the insert may be flush with the surface of the concrete, or it may project therefrom. The recesses 21, for admitting the head of the bolt which in this instance are shown to be located about midway of the length of the insert, may be located at or near one end of the slot, according to circumstances, it being generally desirable to locate these recesses away from the position to be subsequently occupied by the bolt, if this can be predetermined; for although the bolt will be adequately supported even when resting centrally with the recesses as shown in Fig. 6, yet it will generally be found preferable to provide Where possible for having the bolt rest upon uninterrupted portions of its supporting shoulders. Thus in various ways which will be obvious to those who manufacture or employ these inserts, they may be modified in form, dimension and position, to suit different requirements or different conditions of service. It being obvious that these inserts may be adapted to receive either a nut or the head of a bolt, the term bolt head, which for conciseness is employed in the following claims, is intended to include a nut and other equivalent shouldered members that may be employed for the purposes contemplated in the present invention. The reinforcing rods 16 may also be utilized to initially locate and hold the inserts in place, and thereafter to reinforce the inserts and the surrounding concrete.

I claim as my invention 1. An insert for concrete construction, for removably seating the head of a bolt, comprising a hollow elongated body provided with guiding'surfaces for the sides of the bolt head, and having lengthwise extending oppositely disposed flanges in its lower face, the distance between the flanges being less than any transverse width of the bolt head, said flanges being similarly notched at opposite places, so that the bolt head may be 1nserted when two of its corners are in line with said notches, the outer side or base of the notch being of less length than any side of the bolt head, so that when the bolt head has been inserted and seated by a one-eighth turn, the sides of the bolt head will rest uponthe flanges and overlap the notches of said flanges,-whereby removal of the bolt is prevented except when the bolt has been artially rotated to bring the corners of the liead in alinement with said notches.

2. A metallic insert for concrete construction for removably' seating and supporting a square bolt head, provided with longitudinally extending parallel flanges for supporting the under side of the bolt head, and having guiding surfaces approximately fitting the opfposite s ldes of the bolt head to prevent it rom turning, when seated, and having a wider space above the guiding surfaces to enable the bolt head to be turned to its intended seating position, the said shoulders and the said guiding surfaces being provided with oppositely disposed recesses approximately fitting any two diagonally opposite corners of the bolt head, whereby the bolt head may be entered and seated by pushing its diagonallyopposite corners up through said notches, turning the said bolt head in either direction approximately 45 degrees and dropping its parallel sides into place between the said guiding surfaces, and whereby the under engaging surfaces of the bolt head bridge the said notches when seated over them, thus preventing direct removal of the bolt heads when in working so position at any portion of the length of the insert.

3. A metallic insert for concrete construction for removably seating a bolt head, comprising a hollow elongated body provided with internal supporting shoulders for the under side of the bolt head, andoutwardly inclined guiding surfaces above the shoulders for the opposite squared'sides of the bolt head to prevent it from turning when seated, 40

the said shoulders and guiding surfaces being also, provided with oppositely disposed V-shaped notches loosely conforming to the diagonally opposite corners of the bolt head,

whereby the bolthead may be entered and seated in the insert by passing its diagonally opposite corners upwardly through I said notches, then turning the head approximately 45 degrees, and then lowering it to its seating position upon the said shoulders 

